*{
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body{
  font-family: 'Roboto', sans-serif;
}
.wave{
  position: fixed;
  height: 100%;
  left: 0;
  bottom: 0;
  z-index: -1;
}
.container{
  width: 100vw;
  height: 100vh;
  display: grid;
  grid-template-columns: repeat(2,1fr);
  grid-gap: 18rem;
  padding: 0 2rem;
}
.img{
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.img img{
  width: 500px;
}

.login-box{
  display: flex;
  align-items: center;
  text-align: center;
}
form{
  width: 360px;
}
.avatar{
  width: 100px;
}
form h2{
  font-size: 2.9rem;
  text-transform: uppercase;
  margin: 15px 0;
  color: #999;
}

.input-group{
  position: relative;
  display: grid;
  grid-template-columns: 7% 93%;
  margin: 25px 0;
  padding: 5px 0;
  border-bottom: 2px solid #d9d9d9;
}

.input-group:nth-child(1){
  margin-bottom: 4px;
}
.input-group:before,.input-group:after{
  content: '';
  position: absolute;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: #38d39f;
  transition: .5s;
}
.input-group:after{
  right: 50%;
}
.input-group:before{
  left: 50%;
}
.icon{
  display: flex;
  justify-content: center;
  align-items: center;
}
.icon i{
  color: #d9d9d9;
  transition: .5s;
}

.input-group > div{
  position: relative;
  height: 45px;
}

.input-group >div > h5{
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: #d9d9d9;
  font-size: 18px;
  transition: .3s;
}
.input-group.focus .icon i{
  color: #38d39f;
}
.input-group.focus div h5{
  top: -5px;
  font-size: 15px;
}
.input-group.focus:after,.input-group.focus:before{
  width: 50%;
}
.input{
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  border: none;
  outline: none;
  background: none;
  padding: 0.5rem 0.7rem;
  font-size: 1.2rem;
  color: #555;
  font-family: 'Roboto', sans-serif;
}
a{
  display: block;
  text-align: right;
  text-decoration: none;
  color: #999;
  font-size: 0.9rem;
  transition: .3s;
}
a:hover{
  color: #38d39f;
}
.btn{
  display: block;
  width: 100%;
  height: 50px;
  border-radius: 25px;
  margin: 1rem 0;
  font-size: 1.2rem;
  outline: none;
  border: none;
  background-image: linear-gradient(to right,#32be8f,#38d39f,#32be8f);
  cursor: pointer;
  color: #fff;
  text-transform: uppercase;
  font-family: 'Roboto', sans-serif;
  background-size: 200%;
  transition: .5s;
}
.btn:hover{
  background-position: right;
}
.copyright{
  position: absolute;
  width: 100%;
  height: 50px;
  bottom: 2px;
  color: #38d39f;
  text-align: center;
  font-size: 18px;
  font-family: 'Roboto', sans-serif;
}

/*媒体查询*/
@media screen and (max-width: 1080px) {
  .container{
    grid-gap: 9rem;
  }
}
@media screen and (max-width: 1024px) {
  form{
    width: 290px;
  }
  form h2{
    font-size: 2.4rem;
    margin: 8px 0;
  }
  .img img{
    width: 360px;
  }
}
@media screen and (max-width: 768px) {
  .wave{
    display: none;
  }
  .img{
    display: none;
  }
  .container{
    grid-template-columns: 1fr;
  }
  .login-box{
    justify-content: center;
  }
}
